External expulsion fuse plug



Sept. 13, 1932. J. E. SUMPTER EXTERNAL EXPULSION FUSE PLUG Filed Oct. 1, 1924 2 Sheets-Sheet 1 INVENTOR John E. S I zez:

tome 2 Sheets-Sheet 2 J Im E. Sumptez:

Attorney Sept. 13, 1932. J. E. SUMPTER EXTERNAL EXPULSION FUSE PLUG Filed Oct. 1, 1924 m N E M H J 0\\ N. 4 J

=UNITEDYSTATESJPATENT OFFICE? 1.1031; sUMr'rn miiwnnaron sgMINNEsorA, IASSIGNOR To DE TA-swan ELEoTnIooomrANY, orcnIoAG'o;ILLmoIs-A CORPORATION or ILLINOIS E ress. EXPULSIQN FUSE PLUG a esthesiaoaat'et 1,g1 24. Serial No. 740,995. r

invl i oexternal expulsion the operator will not place his hand under l fuse plugs whereinitis ,desired fto provide neath the same and endeavor to force the i a a fuse plugfor high tensionflines' foruse on plug into the housing. This is provided by gyre ulai-ycu outs to losing transformer serrated, pointed surfaces, or in any other QbanksorIine V e y a y a a 2 suitable manner. I o Th present cutoutffuse lplugs will not My fuse plug is adapted to be made in two t standlfmore than twoor threeiblow outs of half portions so that it can readily be taken the fusefbeforethe heat andjelectricreaction apartifdesired, or of a solid nature, having jhas destroyed theutilityof the san1e,so that a fuse receiving tube extendingtherethrough 11 a new cut outRfuseplug isfl requiredl :These in 'a'manner so that the open end of the fuse we e 'usually jinade offporcelain and if they tube is at the bottom of the plug and the shouldfblowfin anj electric storm due to a fuse can be readily inserted therein by open- -\Ilightningidischarge or theload is increased ingthe upper end of the fuse plug and at: a; beyondja] determined amount, then the fuse ta'ching theffuse to the/screw cap which closes I q i p'lug may beblownf out onto the ground and the'upper end of the fuse tube or opening.

j fi fl yi tr yq 41. This Oh1 My invention also includes a cut out housyty e of iusjej holder isknownfasplug c t Out ing and fuse plug designed to provide a cenvhereinflthefuseiwire;eitends over thetop. tral webs portion which separates theconand intoathe body of the-contact'ho'using. f tacting blades of the fuse plug so that duri Myfiinyentionjprovidesalfdevice where y ingthe insertion of the plug the insulating Agatha blowing the fusei nt ely u si Web will prevent anyarcing across the terthe body ofthe cut outhousingiaildmo le p minals. This means of constructionentirely ticularly lbmi selitfisjdes gnedljto provi e separates the terminals so as to provide a handlemeans wherebythefoper ltorG il 1X1 protective means between the terminals and sert theplugpintotthehous ngin a manner a guiding member for the plug, so that the a o 'thatyit is practically?Impo i l f r m plug can be hingedly connected and snapped p tO becomes jured if the amej h d b w intolocking position with the out out housfj out, While heisii i tmg fih oldrs y ing. This form'of construction firmly holds of plu cuts outs has qdesignfor pr nthe fuse plug in operative position v i j q 39 to the operator and justlasllik 'a ln 'i W The invention includes other features and blow outwhilehe isinserting ittin whi h Case designs which provide 'a new and desirable thellar a f c jo the'bl wmgp the construction and these will be more clearly is dangero tothe operatorslfa andha e set forth in the following specification and i l r y-pl s i j e e g tha h ope r claims; i

n in it in t wtl tvi h u y In the drawings forming part of this, speca dangerlwliatsoeverlto the operatoror without jfi ati i li ill ffsp siln 't' ngs, Q il' P the Figure 1 is a side elevation of the cut out [5511119 3%: a}? QQW=UQQ Wlfi h PW M Cut housing showing my fuse plug attached therep "out plugs, and th s replac ng of my plugcan l v t ke lecev e e1111 15 lgifl gilmi i g Figure 2 illustrates a similar view shoW- U w 9 5 ing a portion of the housing and fuse plug in 3-AEfeaturebftheinvention reid'st ath i -lf e H Skirtingbfthe lowenend of the p1 gtQf g bottom view of the cut out a ,arecessiandpermitllthej i pe ebij e s a ,v; and openingofIthe fuse,ch ambersorta-t the la e 1S a Pl i of my u p g e LbIoWing of the fuse will beldirected straight y ng the upper endthereof.

u bu f thj'ndbf th f e l g 1 Figure 5 1s a'bottom new of the same.

Itfisg bqayf atur"'to'fprovidaprotecting Figure 6 is an enlarged side illustration @I edge-about theflowe end of th'efplugsothat showing one half of my fuse plug where the 199 same is made in separable halves and illustrating the first receiving tube in section.

Figure 7 isa perspective View of my fuse plug ready for use.

Figure 8 is a side elevation of an alternative form of my fuse plug and housing.

Figure 9 is a central cross section of the construction illustrated in Figure 8.

Figure-1O is a bottom view of the housing of this construction.

Figure 1-1 is atop view fuse plug illustrated in Figure 8.

Figure 12 is a side elevation-of my fuse plug as of 1212 of Figure 8.

Figure 13 is a sectionon the line 13 18 ofFigure 9. p 7

M 'fuse plug Ais provided with a top 10 and abottomportion 11 which formthe ends of the'body'orhandle portion 12 designed to I be easily'gripped in the hand of the operat r so that the fuse plug A can be inserted into the cut-out housingB. f

Thecut out'housing B is made of porcelain or other suitable insulating m-aterialand is';provided with the usual openings for re-' ceiving'the line wires C on either side thereof, whichare connected within the housing in the ordinary well known manner. Fig ure 3illustrates a bottom view of :the housing illustrating the connections for, the line Wires therein. The housing B is provided with a central recess 13 which'is of a circular nature having angular channel like recesses 14 of the samefldepthconnecting with the circul-ar portionflii on either side thereof. i

My expulsion fuse plug is provided with a lug 'member 15 of a similar shape to the recess 13.,fexceptihg of a less than a complete circle in cross section and the lug 15 is formed with aEkey member 16 which isada-pted to fit into the channel openings 14. The fuse plug A can be inserted in any position, held so that 'the key 16'will fit into either of the screw 2l isthreaded. This cap screw 21 closes the upper end of the fuse tube 22 which is positioned and extends through thebody .12 of the handle A and'opens-into the recess23 formed in the lower end of the-handle; The recess isprovided with a downwardly extending skirt 24 about the same so as-to provide the necessary depth toJthe, recess123, The fuse-tube22 can be madeof "any suitableheat resisting material and wherethe fuseplug A is 'forme din a singlepiece oflinsulating material, the same is prov ded with anopening 25 extendingthrough the same which is adapted to receive the fuse wire 26.

The fuse wire 26 is connected to the cap plug 21 by the screw 27 orin any other suitable manner at the upper end of the plug A and extendsacross in the opening 23 to the metallic br conducting member 28, being secured thereto by the screw 29. The conductf'ing member 28 extends through the handle ody porti n 2 d; s in egral y secured to the blade 18at' the upper end .of the fuse plug A. In this manner my expulsion fuse plug is provided-with a means for receiving a fuse wire 26 with the wire extending down- -ward=through-the opening 25 and providing.

an open end 30 into the chamber 23 from the fuse opening 25, so that if the fuse 26 should blow out when the fuse plug A is being inserted 'into the housing B the force of the blowing-of the fuse will be external and will blow out through the opening 30, forcing the fuse plug A up against the housing instead of having ajtendenc'y to blow it out of the housing, as is the-.cas'e-in fuse plugs heretofore used. This is an important feature of my invention. The cap screw 21 firmly closes the'upper end of the opening 25 and prevent; any possible chance of the fuse blowing up into the housing.

. The skirt 24' protects the operatorso that my fuse plug IA can be easily held and inserted into'the housing'B without practically any dangerjto the operator, whether it is being inserted whilethe line is live or'by reason of. any short, circuits.

"The lower endll of my fuse plug'A is providedwith a serrated, sharp, pointed edge which provides a means of protection against the operator placing his handover the bottom of the fuse plug A to force it into the housing This serrated surface can be formedin any suitable manner to carry out the principle. of my invention.

Where thefuseplugA isformed in two" half portions, namely, 31 and 32, suitable holding screws 3310f ordinary construction are provided to hold the parts together. Obviously, the fuse plug A can be formed of a singleparusuch as bakelite or other insulating material with the opening 25 formed therein and the connecting member 28 cast or otherwisein'serted within the handle portion 12 when the same is made. V

It is quite evident that my fuse plug is of material importance to the operator and also tothe userof such devices, for the reason that it will have a tendency to hold itself tighter within the housingvif the fuse blows and the explosion in. the blowing of the fuse is of an' xplosive atu e, with the force of thn blowing being idi rectly downward out of the skirt 24;,{so as to provide the external exp'ulsi onffuse :plug, rather than having the fuse blow out up in therecessl3and channels 1% as h a of e, typ of fUSe'plugs,

of fusef plugs to, blow otherwise, b'ecause the 1 fusefextendsacrossthe'web-member which is housing Eu j adapted to; e inserted into th My. external expulsion a; operation andjaccompl'ishesa-result which is most desirable 5 in the protection of the pa erator team limi atin theuse oftongs or p otherispecial imea-ns for inserting; the same, to say noth ngofthe saving by reason of the fact Ithatmyplug does not blow out onto the i 1 ground;andbreaker;injurethecut out hous mg by the intense he trrom the blowing of the fuse and {the arc caused itherehy within thelfhousingfl The cut n a heated; at all, by {the gfu of rather the bljowing of theffuse takes place in i housing is not I i i the hand 1e offlthe plug andthe force andeifect tion rather than withimthe housing, as has provenf so detrimental to the present 1 forms of plugsandcutouthousing H tl'OliOf my fusefplugy together with a cut outhousing wherein the fusefplugD which is oftheljsamegeneralconstructionas the fus Plug Ar hiiigedly C n e t y e ofthe hookf35, whichengagesin the loop36 ion, thejhacle ofwthe housing while the springshap ametes front of the housing a Q aconnectsgthefuseplug Dfin operative position to the li'ousingE. g

Injthis constructionkthe fuse plug D is a formed 1 with; upwardly projecting, cenii-rally positioned lug memberLBS, which is f e meuime m1 withlwtheabody of the plug Deer handle'portionf 39 and provides an insulating. member which" Iris adapted to separate,the coiitacts iofthe ihousing E; A central recess 40; for jnedf in the housing is f adapted'to receivethe plug 38,whichis curved I tached byf engaging. the hook, within lathe loop 36 a and? drawing *thefplug toward the housingsfEQffllnYthisgwayitheffuse plug D issnapped Pinto t t' osition with the a e The plug flD is formedicontacting bladesflel and-:42:which are adapted to engage in the springelips{l3,positioned within, a ,frhe housingzEr,Theiblades41 and-42 are 53 similar totthe'blades lfhaiid l8 ofthe plug A; and, y form tithe self-same function in closing the contactsjoflthe cutoutuhousing 1 vPlug D is p rovided' ifwith lawfuse wire 26 whichis housed within1thefhand1e 39 of the plugD "in thef saine mannertjas is illustrated for" the 'f construction i of-the pluglAr The recess 23;i 1,;th@'b5aom of; the ,plug D per mitsthe connection of the fuse wire'26 across the bottom of the same and; the opening fuse plughas proven eryfefficient intests and my plug, but

of the same is in; a downward, external direc-' Inthe drawingsinLFiguresS to 13 inclu-' sive, I-jhave illustrated an alternative forma on eitherside so th'atthe plug D can be at-.

' jextending fha1idlet39, which is open at thelowerend in the same manner as the plug A, is provided with the opening which permits the force of theblowing of the fuse 26 to be outward, directly through the bottom of the fuse plug D.

In this construction the'cap screw- .21 on gages beneath one of thewebrmembers 44C,

which forms a shoulder against which the same rests when the fuse plug D isin operating position. Thus the webs 44 take the force of the blowing of the fuse to some extent by-rcason of the'contact 0f the cap screw 21 with one of the webs 44, when the plug'is in-operativeposition.

' Theoperationand use ofthe plug D is of the self same function as of the plug A. so

that an external expulsion plug is provided,

which protects the operator, prevents the plug from-beingblo-wn off when the fuse blows out and provides an inexpensive, practical fuseplug for cut outs for high tension lines, which is very practical ,andof a desirable nature. i i I Inaccordance with the patent statutes I haverdescribed the principles of my invention, illustrating the best embodiment thereof, but I desire to have it understood that theinvention can be carried out by other means and applied to uses other than those above. set forth within the scope of the fol,-

lowing claims:

I I claim; a a a I 1. An external expulsion fuse plug, includ ing a handle member, a fuse receiving passage extending through said handle member,

said plug having in the bottom thereof an opening communicating with said fuse pas- 'sageway to permit the force of the blowing of the fuseout of the bottom thereof, and a conductor to which one end of the fuse is attached extending through said plug adjacent said fuse passage and a secondconductor leadingto said fuse passage'to which the other. end of the fuse; is attached to complete theaconnecting circuit :for said plug, both conductors being adapted to make contact with the contacts 'ina cut out housing. -,-2.A fuse plug forcut'out housings for closing transformer lines, including a sep-' arable handle member and accessiblefuse receiving means within said handle member fuse and the force and effect thereof is entirewithout and, away from the cutout housing;

4.. A fuse-v plug for high tension cut outs, including a separable handle member adapted to be positioned in a manner to extend from the bottomof the cut out and replaceable fuse attaching means readily accessible within said handle positioned in' a manner to permit thefuse to blow out of the bottom of said handle.

fuse plug including a handle, electric contactmembers projecting from one end 'o'f saidrhandle, means for receiving a fuse with. in said handlein a manner to insulate the same therein and means adapted to permit 1 the blowing of the fuse out of the handle and away from the same for the purposesspeci- -'-6.'A ifuse plug including a handle member formed of insulating material, means for holding .said fuse plug in contact with a cut.

out housing and a fuse having the major 1 portionthereof replaceably positioned within and protected-by said fuse plug, and'fuse. supporting means including a cap screw adapted to be positioned adjacent said out out housing and 'an open end in said fuse plug from which the end of said fuse projects to permit the blowing of the fuse into the open atmosphere, away from the cut out housing.

fuse plug fora cut out high tension housing, including means for supzportinga fuse ina manner to cause the fuse to blow out into the open atmosphereythe force of the blowingof the fuse being adapted to tend to force the plug toward the housing to prevent j the dropping of the fuse plug'upon blowing of the fuse.

"8, A fuse plug includingxa handle member formed of insulating material, a guide-shank extending from said handleand formed integral therewith, a key-"formed on s'aid'shank outahouslng. I

adapted to fit the channel portion formed in a cut out housing in: a-{manner to permit the fuse plug to be inserted" -from either side thereof, electrical contact members'supported by said handle and means for supporting an electrical fuse within said handle inamanner sothat the blowi'ng 'ofi the fuse will be outlof the handle :and remote from the cut 9. A fuse plug ber formed-ofzinsulating material, electrical contacts extending into; said handle, a guid- 7 ing portion projecting from said-fuse'plug handle in amanner to form a guide for the fuse plug in connecting the same toa cut out housing, sa dgulding member of said handle forming'an insulating'ineans adapted to sep 3113136 the contact members of the fuse plug from each .other'and from the coactmg co n-V ta'ct members of the cut out housing to prevent arcing across the contacts and fuse supporting-means within said handle whereby the' blowing of the kfuse is entirely in the including a handle mem- 'handle 'and remote from the cut out housing;

10. A fuse p'lugfor high-tension cut out housing, including 'ahandle member adapted to support a fuse in a manner ;to cause the fuse to blow out of said handle, a recess formed in said handle having a depending skirt thereabout, out of which the force of theblowing of'the fuse takes place, and a serrated edge aboutsaid skirt tending to prevent the operator from placing his hand on saidskirt to force said plug into .the cut closing the contact side of the fuse plug to prevent the force and effect of the blowing of the fuse toward the contact side thereof,

to protect the contacts of the plug against the effect-of the blowing of the fuse and to cause the plug to be more firmly forced into contact %to prevent dropping-of the fuse plug,

and a recess in the sideof the fuse plug exposing a portion of the fuse in the outer atmosphere. 1

13. A 'fuse plug for high tension cut outs including a handle member formed of insulating material, contact blades extending from said handle means for connecting one of said blades with a fuse,a passageway extending through said handle for thefuse, a member extending adjacent said fuse passageway adapted to :be connected to the other of said contact-blades and a recess in said handle whereby one end of said fuse can "be connected and extend across in said recess to contact with said member extending through said handle adjacent said fuse passageway, said recess 1n said handle permitting the fuse to blow into the openatmosphere.

14:.A fuse switch, comprising a socket member havingcontacts, a removable hollow plug receivable within the-socket mem ber, provided with a hollow handle extension adapted to communicate with the interior of the plug, contacts on the plug, complementary to the contacts in the socket member,

a'f use cartridge'electrically connected with one of the contacts-on the plug, and a fusi-' ble element having electrical connection with the-cartridge and the other contact on the plug.

j 15 A fuse switch, comprising a socket having spaced contacts, a. hollow-member fcemprisling a plugateneend and a handle at the ether, the h'andle projecting outward- "1y'frdmtheseekeflmember, contacts on the flahollew gmembef eomplmentary to the con- 5 t acts in the socket, efus ible member, and a fuse earti'idge sagidcartridge being in elecj trical cehnection withhoneo f the contacts on thefhellewmember,thehollow member havm iI'ig its free end open te permit gases to escape g when the fusiblemember is fused. 

